Guzzini Double Walled Borosilicate Thermo Glasses, 9-Ounces, Set of 2 Made from hand blown borosilicate glass, this beautifully designed glass is famed for its amazing insulating properties Unique double walled glass thermo design retains your beverage temperatures longer Elegant and delicate looking but durable; embossed with the Guzzini logo Made in Italy; 9-Ounces: Set of 2 Microwave and dishwasher safe; Measures 3-1/3 by 3-2/3-Inches